package com.ljz.filter;

import com.ljz.entity.User;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebFilter("/admin/*")
public class PowerFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        HttpSession  session = request.getSession();
        User user = (User) session.getAttribute("user");
        if (user == null) {
           response.sendRedirect("../login.html");
        } else {
            filterChain.doFilter(request, response);
        }
    }
    @Override
    public void destroy() {

    }
}
